Metal-punch



(No Model.)

G. McDONALD.

METAL PUNCH. No. 316,160. Patented Apr. 21, 1885 \NI'I NM N: WiTNESSE/fiINVENTOR I mm @zz/ J MQ BY PATENT GILBERTMODONALD, OF AUGUSTA, KANSAS,ASSIGNOR OF TWO-THIRDS TO DAVID BUN N, OF SILVER CITY, TERRITORY OF NEWMEXICO.

METAL-PUNCH.

- SPECIFICATION forming part of Letters Patent No. 316,160, dated April21, 1885.

7 Application filed July 29,1884. (N model.)

T0 on whom it may concern:

Be it known that I, GILBERT MCDONALD, of Augusta, in the county ofButler and State of Kansas, have invented a new and ImprovedMetal-Punch, of which the following isa full,

clear, and exact description.

This invention relates to a metal punching or cutting machine, moreespecially designed for the use of tinners and blacksmiths for punchingor cutting sheets or plates of metal,

hot or cold; and the invention consists, principally, of a wedge havingcogs or teeth formed upon its edges interposed between the power and theplunger which carries the punching or I 5 cutting tool.

The invention also consists of the construction, arrangement, andcombination of parts, all as hereinafter described and claimed.

Reference is to be had to the accompanying 2o drawings, forming part ofthis specification, in

which similar letters of reference indicate corresponding parts in bothfigures.

Figure 1 is a front elevation of my new and improved punch, andFig. 2 isa side eleva- 2 5 tion of the same.

The frame or standard A of the punch is bolted upon the bench, floor, orother support B, and is constructed to hold the dieblock 0 and plungerD, which latter carries 0 the punch or cutting-tool E.

F is the power-lever for reciprocating the plunger D, which lever isformed with the circular head f and segmental teeth f, andis fulcrumedupon the bolt G, which passes through 3 5 the plate H and the upper endof the frame or standard A.

The plunger D is divided at its upper end so as to form the parallelmembers at d, between which is journaled upon the bolt d the roller I,which has the teeth or cogs i formed and 'i engage, as shown clearly inFig. 1, so 5 that as the lever F is brought downward the wedge J will becarried forward, causing the plunger D and tool E to be forced downwardwith great force, sufficient to cause the tool E to cut or punch sheetsor plates of metal placed upon the die-block O.

The upward movement of theleverF causes the cogs f to force the wedge Jbackward, and the said lever at the same time lifts the plunger D andtool E by means of the slotted and curved plate K, which is attached tothe plunger and to the lever F, as shown clearly in the drawings.Instead of the plate K a chain or other means might be used for liftingthe plunger D by the backward or upward movement of the lever F.

During the upward movement of the plunger D and tool E the plate Lserves to limit the upward movement of the piece of metal cut or punchedwith the tool, so that the tool will be withdrawn from the metal as incommon punches.

Constructed in the manner described the punch is very powerful andpractical, and not liable to get out of order, and it is cheap anddurable. I

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a metal-punch, the combination, with 7 5 a plunger and itsoperating-lever, of a wedge interposed between said plunger and lever,and operated by the latter, as set forth.

2. The lever F, having the cogs f, and the plunger D, having coggedwheel I, in c0mbi- 8c nation with the cogged wedge J, placed between thelever and roller, substantially as set forth.

GILBERT MCDONALD.

Witnesses:

J. A. RHOADES, J. A. WILLIAMS.

